How's Coherent UNIX ?

[Eric D. berggren]

  Pardon me if I missed the big boat over Coherent UNIX but while reading
a Dr. Dobb's journal, I saw the add for this package for only $99.95.(!)
  Can anyone give me the scoop over what this is/how it works/and how
compatible it is? It talked alot about MSDOS filesystem portability.
Is it able to run MSDOS applications as well? 
  Any information would be appreciated. Thanx...